Governmental and environmental agencies have recognized that Data Warehouses (DWs) oriented to environmental domain can cause a deep impact in the ability to preserve the environment. However, extracting environmental data from external sources in order to load them into the data organization area of a DW is much more complex when compared with conventional DWs. In environmental DWs, extraction...

Service quality is a factor for measuring customer satisfaction in hotel industry. Therefore, in order to achieve competitive advantage and maintain customers, improving service quality has become an important tool in hotel industry to achieve customer satisfaction which is lead to customer loyalty. Because companies are developing close relationships with suppliers and customers. Since then th...

These last years, the sources of data became very heterogeneous and massive. The term "big data" is born to indicate this phenomenon. Unfortunately, he becomes difficult to manage big data to power the decisional system, and also it increases the time of interrogation of data from data warehouses. Several research works focused recently, on the proposal for the architectures of data warehouses ...

This paper proposes the macro model and micro model for the efficiency evaluation of data warehouses (DWH), and introduces Fuzzy Data Envelopment Analysis (FDEA) and Data Envelopment Analysis (DEA) to comprehensively assess DWH efficiency. FDEA can determine the efficiencies of data warehouses with multiple input / output variables, and also resolve the problem that standard DEA cannot handle w...

We studied a logistics network design model composed of plants, warehouses and customers. For designing this integrated model, we had to make two decisions simultaneously; the location of plants and warehouses, and the product distribution from plants to customers through warehouses. We provided a heuristic using the genetic algorithm. The chromosome presents the location of plants and the allo...

Background. Adults benefit more from an external focus than internal focus when performing motor skills. Objectives. The aim of this study was to investigate the effects of internal and external focus of attention on dart throwing performance in children with and without developmental coordination disorder. Methods. Twenty men, 20 normal boys and 20 boys with developmental coordination d...

Pseudo-relevance feedback (PRF) is a classical technique to improve search engine retrieval effectiveness, by closing the vocabulary gap between users’ query formulations and relevant documents. While PRF typically applied on same target corpus as final retrieval, in past, external expansion techniques have sometimes been obtain high-quality pseudo-relevant set using . However, such approaches ...